Locomotive-boiler



(No Model.)

W. P. HENszEY, Locomotive Boiler.

No. 232,032. Patented'Se pt. 7,1880.

WITNESSES N. PETERS, PNQTO-UTHOGRAPHER. wASHiNGTpN. n 0

NITED STATES PATENT OFFICE.

WILLIAM P. HENSZEY, OF PHILADELPHIA, PENNSYLVANIA.

LOCOMOTlVE-BOILER.

SPECIFICATION forming part of Letters Patent No. 232,032, dated September 7, 1880.

(No model.)

To all whom it may concern:

Be it known that I, WILLIAM P. HENSZEY, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented an Improvement in Locomotive-Boilers, of which the following is a specification.

My improvement relates to boilers for high-. speed locomotives; and it consists in the combination of a fire-box of much greater width than usual with a body or barrel of oval form for containing more than the ordinary number of tubes, the object of the combination being to obtain the increased heatingsurface deinanded by the high speed of the engine, and to make the aggregate tube-area proportion ate to the increased grate-surface.

In theaccompanying drawings, Figure l is a perspective view of my improved boiler for locomotive-engines; Fig. 2, a transverse section of one-half of the barrel or body of the boiler on the line 1 2, Fig. 1; and Fig. 3, a transverse section of one-half of the firebox on the line 3 4.

High speed locomotives demand a large amount of heating-surface. I therefore make the firebox A of touch greater width than usual, and of the form best observed in Fig. 3, so that extended grate-surface may be obrained.

In Fig. 3, a is the top of the fire-box; b, one side of the same, partly inclined and partly vertical and c is the outer shell of the firebox.

The increased gate-surface in the fire'box requires an increased number of tubes in the body or barrel B of the boiler, in order that the aggregate tube-area may be proportionate to that of the said grate-surface.

The driving-wheels m m cannot be nearer to the body of the boiler than is shown in Fig.2, and if the said body be made cylindrical it would not contain the desired number of tubes. I therefore make it in the form of an oval, the major or vertical axis of which is longer than the minor or horizontal axis, and this enables me to introduce the extra number of tubes desired.

Under pressure the oval body of. the boiler has a tendency to assume a cylindrical form, and in order to counteract this tendencyI connect the opposite sides of the body together by cross-stays a at appropriate intervals.

As regards the width of the fire-box it may vary to some extent, but should not be less than the distance across the opposite drivingwheels m m. In the present instance it is of greater width than this distance.

I am aware that the fire-box of a locomotive has heretofore been made much wider than the body or barrel of the boiler, also that the body of a locomotive-boiler has been made of oval form prior to my invention; but a boiler in which these two features are combined for the attainment of an aggregate tube-area proportionate to the increased grate-surface of the fire-box has not been made within my knowledge.

Locomotive -boilers have been made with oval barrels for the purpose of increasing the number of tubes, and the fireboxes of locomotive-boilers have been made of increased width throughout a limited portion of the length, without, however, increasing the available grate'area. I claim neither of these features; but

I claim as m y invention- The combination, in a locomotive-boiler, of a body or barrel of oval form with a firebox which throughout its entire length is as wide as or wider than the distance across the driving-wheels, as set forth.

In testimony whcreot'I have signed my name to this specification in the presence of two subscribing witnesses.

WM. P. HENSZEY.

Witnesses J AMES 'F. TOBIN, HARRY SMITH. 

